CVE-2024-10054
📋 TL;DR
This vulnerability in the Happyforms WordPress plugin allows administrators to inject malicious scripts into plugin settings, which then execute when other users view those settings. It affects WordPress sites using Happyforms versions before 1.26.3, particularly in multisite configurations where unfiltered_html capability is restricted.
💻 Affected Systems
- Happyforms WordPress Plugin
📦 What is this software?
Happyforms by Happyforms
⚠️ Risk & Real-World Impact
Worst Case
An attacker with admin privileges could inject persistent malicious scripts that steal session cookies, redirect users to malicious sites, or perform actions on behalf of authenticated users when they view the compromised settings pages.
Likely Case
Malicious admin injects JavaScript that steals session cookies or redirects users, potentially leading to account compromise of other administrators or editors who view the affected settings.
If Mitigated
With proper access controls limiting admin privileges to trusted users only, the impact is minimal as exploitation requires administrative access.
🎯 Exploit Status
Exploitation requires administrative privileges. Attack involves injecting JavaScript into plugin settings fields that lack proper sanitization.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.26.3
Vendor Advisory: https://wpscan.com/vulnerability/5a9fd64b-3207-4acb-92ff-1cca08c41ac9/
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Happyforms plugin. 4. Click 'Update Now' if update available. 5. Alternatively, download version 1.26.3+ from WordPress.org and manually update.
🔧 Temporary Workarounds
Remove Admin Privileges from Untrusted Users
allLimit administrative access to only essential, trusted personnel to reduce attack surface.
Disable Happyforms Plugin
linuxTemporarily disable the plugin until patching is possible.
wp plugin deactivate happyforms
🧯 If You Can't Patch
- Implement strict access controls to limit administrative privileges to essential personnel only
- Deploy web application firewall (WAF) rules to detect and block XSS payloads in plugin settings
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for Happyforms version. If version is below 1.26.3, system is vulnerable.Check Version:
wp plugin list --name=happyforms --field=versionVerify Fix Applied:
Confirm Happyforms plugin version is 1.26.3 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual modifications to Happyforms plugin settings by admin users
- JavaScript payloads in plugin setting updates
Network Indicators:
- Unexpected JavaScript execution on Happyforms settings pages
- External script loading from Happyforms interface
SIEM Query:
source="wordpress" AND (event="plugin_settings_update" AND plugin="happyforms" AND (data CONTAINS "<script>" OR data CONTAINS "javascript:"))